Electronic device and method for manufacturing the same
An electronic device including a new oxide layer and a method for manufacturing the same are provided. The electronic device of the present invention includes an oxide layer, which is formed of an oxide containing an element from group IIa, an element from group IIb and an element from group IIIb. For example, it can be applied to a solar cell including a back electrode serving as a first electrode layer, a transparent electrically conductive film serving as a second electrode layer having a light-transmitting property, and a semiconductor layer that is provided between the back electrode and the transparent electrically conductive film and functions as a light-absorption layer, and including an oxide layer provided between the semiconductor layer and the transparent electrically conductive film.
1. An electronic device comprising:
an oxide layer;
a first electrode layer;
a second electrode layer having a light-transmitting property; and
a semiconductor layer being provided between the first electrode layer and the second electrode layer and functioning as a light-absorption layer,
wherein the oxide layer comprises an oxide comprising an element from group IIa, an element from group IIb and an element from group IIIb, and
the oxide layer is provided between the semiconductor layer and the second electrode layer, and the electronic device functions as a solar cell.
2. The electronic device according to claim 1 , wherein the element from group IIa in the oxide is at least one element selected from the group consisting of Be, Mg, Ca, Sr and Ba, the element from group IIb in the oxide is Zn, and the element from group IIIb in the oxide is at least one element selected from the group consisting of B, Al, Ga and In.
3. The electronic device according to claim 2 , wherein a composition ratio of the element from group IIIb in the oxide is smaller than a sum of a composition ratio of the element from group IIa and that of the element from group IIb in the oxide.
4. The electronic device according to claim 3 , wherein the composition ratio of the element from group IIa in the oxide is smaller than that of the element from group IIb in the oxide.
5. The electronic device according to claim 2 , wherein a composition ratio of the element from group IIa in the oxide is smaller than that of the element from group IIb in the oxide.
6. The electronic device according to claim 1 , wherein the oxide further comprises an element from group Vb.
7. The electronic device according to claim 1 , wherein the semiconductor layer comprises a semiconductor whose main constituent elements are an element from group Ib, an element from group IIIb and an element from group VIb, and the semiconductor layer and the oxide layer are layered.